Add not_needed function

tools/gn/args.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/args.h"
 
 #include "base/sys_info.h"
 #include "build/build_config.h"
+#include "tools/gn/scheduler.h"

[brettw, 2017/06/28 20:16:49]

This should be no longer necessary.

[Petr Hosek, 2017/06/28 23:21:32]

Done.

 #include "tools/gn/string_utils.h"
 #include "tools/gn/variables.h"
 
 const char kBuildArgs_Help[] =
     R"(Build Arguments Overview
 
   Build arguments are variables passed in from outside of the build that build
   files can query to determine how the build works.
 
 How build arguments are set
@@ skipping 387 matching lines @@
     Scope* scope) const {
   lock_.AssertAcquired();
   return declared_arguments_per_toolchain_[scope->settings()];
 }
 
 Scope::KeyValueMap& Args::OverridesForToolchainLocked(
     Scope* scope) const {
   lock_.AssertAcquired();
   return toolchain_overrides_[scope->settings()];
 }